Buenoa exilidens Barbosa, Nessimian, Ferreira-Keppler

Barbosa, Julianna Freires & Nessimian, Jorge Luiz, 2013, The genus Buenoa Kirkaldy, 1904 (Hemiptera: Heteroptera: Nepomorpha: Notonectidae) in northern Brazil: inventory, new records, and new species, Zootaxa 3694 (2), pp. 101-130 : 107

Buenoa exilidens Barbosa, Nessimian, Ferreira-Keppler

Fig. 18–20

Buenoa exilidens Barbosa, Nessimian, Ferreira-Keppler, 2010a: 52 [Type locality: Brazil, State of Amazonas, Barcelos Municipality, Serra do Aracá, base, Igarapé da Anta; Types in Instituto Nacional de Pesquisas da Amazônia ( Brazil)].

Comments. Buenoa exilidens is similar, in general appearance, to B. platycnemis (Fieber, 1851) with its dark brown color and rostral prong originating laterally on the distal region of the third rostral segment, and distinctly longer than this segment. According to Barbosa et al. (2010a), B. exilidens differs from the first species by its rostral prong being thinner ( Fig. 18 , 43 ); the pronotum not tricarinate; the apex of the fore femur a little narrower ( Fig. 19 , 44 ); the stridulatory area with four to seven irregular ridges; and the claspers distinct ( Fig. 20 , 45 ). The pronotum of Buenoa platycnemis is distinctly tricarinate, and the stridulatory area has 11 to 14 well-marked ridges. The rostral prong of B. exilidens is similar to that of B. tumaquensis Padilla-Gil, 2010 , a species that occurs in Colombia. Buenoa exilidens , however, lacks the parallel striae perpendicular to the stridulatory comb of the fore femur, with fewer ridges, and less teeth on the stridulatory comb of the fore tibia than in B. tumaquensis .

Material. BRAZIL: Estado do Amazonas, Município de Barcelos, Serra do Aracá, base, Igarapé da Anta, alt. 152 m [00.87913ºN / 63.45395ºW], poça em rocha (laje), 03.VIII.2009 (U. G. Neiss): 1 m macropterous, holotype (INPA). Paratype: idem holotype, 1m macropterous (INPA).

Figures

FIGURES 13 – 26. 13 – 17. Buenoa dilaticrus Barbosa, Nessimian & Ferreira-Keppler. 13, Lateral view of male rostrum with rostral prong shorter than third rostral segment; 14, Ventral view of male fore leg without stridulatory area on femur and dissimilar stridulatory teeth on tibia; 15, Dorsal view of fore leg with internal margin of tibia bluntly projected; 16, Mid-tibia with lateral expansion near the base of lateral margin; 17, Claspers. Scale bar: 0.5 mm. 18 – 20. Buenoa exilidens Barbosa, Nessimian & Ferreira-Keppler. 18, Lateral view of male rostrum with rostral prong distinctly longer than third rostral segment; 19, Ventral view of male fore leg with stridulatory area on femur and similar stridulatory teeth on tibia; 20, Claspers. 21 – 22. Buenoa femoralis (Fieber). 21, Lateral view of male rostrum with rostral prong distinctly longer than third rostral segment; 22, Ventral view of male fore leg with stridulatory area on femur and similar stridulatory teeth on tibia. 23 – 26. Buenoa fuscipennis (Berg). 23, Lateral view of male rostrum with rostral prong distinctly shorter than third rostral segment; 24, Ventral view of male fore leg with a tubercle on trochanter, without stridulatory area on femur and similar stridulatory teeth on tibia; 25, Midtibia with internal margin dilated; 26, Claspers.

FIGURES 38 – 49. 38 – 39. Buenoa pallipes (Fabricius). 38, Lateral view of male rostrum with rostral prong distinctly longer than third rostral segment; 39, Ventral view of male fore leg with stridulatory area on femur and dissimilar teeth on tibia. 40 – 42. Buenoa paranensis Jaczewski. 40, Frontal view of male rostrum; 41, Ventral view of male fore leg with stridulatory area on femur and similar teeth on tibia; 42, Claspers. 43 – 45. Buenoa platycnemis (Fieber). 43, Lateral view of male rostrum distinctly longer than third rostral segment; 44, Ventral view of male fore leg with stridulatory area on femur and similar stridulatory teeth on tibia; 45, Claspers. 46 – 49. Buenoa tarsalis Truxal. 46, Lateral view of male rostrum with rostral prong slightly longer than third rostral segment; 47, Ventral view of male fore leg with stridulatory area on femur and slightly dissimilar teeth on tibia; 48, First tarsal segment of mid-leg deeply emarginate; 49, Claspers. Scale bar: 0.5 mm.